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Paper Information

Journal:   IRANIAN JOURNAL OF TOXICOLOGY   MARCH-APRIL 2018 , Volume 12 , Number 2; Page(s) 27 To 32.
 
Paper: 

EFFICIENCY OF SBR PROCESS WITH A SIX SEQUENCE AEROBIC-ANAEROBIC CYCLE FOR PHOSPHORUS AND ORGANIC MATERIAL REMOVAL FROM MUNICIPAL WASTEWATER

 
 
Author(s):  SHAHANDEH NADIYA, JALILZADEH YENGEJEH REZA*
 
* DEPARTMENT OF ENVIRONMENTAL ENGINEERING, AHVAZ BRANCH, ISLAMIC AZAD UNIVERSITY, AHVAZ, IRAN
 
Abstract: 

Background: Various chemical, physical and biologic treatment methods are being used to remove nitrogen and phosphorus from wastewater. Sequencing batch reactor (SBR) is a modified activated sludge process that removes phosphorus and organic material from sanitary wastewater, biologically.
Methods: This study was conducted in 2016.The performance of an aerobic-anaerobic SBR pilot device, located at Ahwaz West Wastewater Treatment Plant, Ahwaz, southern Iran in phosphorus and organic material removal was evaluated to determine the effect of the aerobic-anaerobic step time on the efficiency of nitrogen and phosphorus removal, the effect of changing the sequence of steps and the effect of time ratio on phosphorus removal efficiency. A reactor of 8 L was used. Influent contained 397 and 10.7 mg/l COD and phosphorus, respectively. The pilot plant started with a 24 h cycle including four cycles of 6 h, as follows: 1- Loading (15 min), 2-Anaerobic (2 h) -Aerobic (2 h), 3- Settling (1 h), Idleness (30 min) and 5- decant (15 min).
Results: After reaching steady conditions (6 months), Removal percentages of phosphorus, BOD5, COD, and TSS in The SBR over a period of 6 months was 79%, 86%, 89% and 83%, respectively.
Conclusion: Result of this study can be used for designing and optimum operation of sequencing batch reactors.

 
Keyword(s): ENVIRONMENT, PHOSPHORUS, SBR, WASTEWATER
 
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